I think Ice Square was an attempt at replicating the success of sta-2.
There is a long way with some amount of cover, a short way that is quick but easier to defend with lasers on top, the spawns are right next to the goalposts, and are elevated compared to the central area, and there is cover around the spot where the Fumbi spawns. Finally there is a sort of bridge connecting the two camps.
But Ice square doesn't play as well as sta-2 for several reasons. Snatching the Fumbi in the middle is too easy, so you never see the two teams fighting for control over the mid area, the ramp area is too long, the bridge thing is kind of useless unless you're sniping, the geometry doesn't allow for many jumps, especially in in the short way, nobody likes spikes and there is an option to wall shoot when attacking from the ramp area.
I think the most important things you have to get right if you want to replicate how sta-2 plays are:
-map traversal has to be quick when nobody is bothering you
-The map needs to have built-in hazards to help the defenders to compensate for the quick map traversal options
-there has to be several viable options when attacking
-There needs to be a reason for people to want to control the mid area, meaning that picking up the Fumbi should not be free.
-there has to be jumps
-you should be able to understand what's going on from one quick glance from almost everywhere on the map (or you end up with temple or highway)